Monographs Details: Riccia brasiliensis Schiffn.
Bischler, Hélène, et al. 2005. Marchantiidae. Fl. Neotrop. Monogr. 97: 1--262. (Published by NYBG Press
Description:Species Description - Thalli in partial rosettes, or in gregarious mats, or 2-3 lobes grouped; lobes 2-3 times forked, 3-7 mm long, 0.6-0.9 mm wide, rounded, or obtuse, or emarginate apically, sometimes broadened behind apex; dorsal side light bluish green, margins obtuse, inflexed; flanks pink-violet; ventral side pale green. Median groove indistinct. Cilia few, hyaline, narrowly triangular, in upper part of flanks from top to bottom of lobes, more numerous apically, some short, 25-75 µm long, smooth, obtuse or rounded apically, others 80-240 µm long, 20-30 µm wide, subacute or obtuse apically, thin-walled, granulose in the upper 2/3. Ventral scales short, inserted below the cilia, pink-violet, cells 36-55 × 24-30 µm. Cross section of lobes 0.40.5 mm high, 2-3 times as wide as high; dorsal edge slightly ascending and rounded laterally; flanks rounded, erect; ventral edge convex. Monoecious. Sporangia bulging. Spores 84-108 µm diam., light red-brown; wing irregular, narrow, 2.5-3 µm wide, wider near the pores where it reaches 5-7 µm, granulose, or wing nearly absent; distal face with 7-10 (-11) areoles across diam., limited by conspicuous ridges with large tubercles, the areoles 8-10(-12) µm diam.; proximal face with smaller areoles but with similar ridges and tubercles, triradiate scar weak.
Discussion:Riccia brasiliensis is related to R. lindmanii but can be distinguished from the latter species by the presence of smooth as well as granulose cilia, and by the spores <108 µm in diam., with <=11 areoles across the diam, of the distal face.
São Paulo Brazil South America
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